Function: adjoin

adjoin is a function alias for cl-adjoin, defined in cl-lib.el.gz.

This function is obsolete since 27.1; use cl-adjoin instead.

Signature

(adjoin ITEM LIST [KEYWORD VALUE]...)

Documentation

Return ITEM consed onto the front of LIST only if it's not already there.

Otherwise, return LIST unmodified.

Keywords supported: :test :test-not :key

Aliases

adjoin (obsolete since 27.1)